Which of the following is a symptom of a heart attack?

Extreme fatigue can indeed be a symptom of a heart attack, especially in women. During a heart attack, the body can experience a significant amount of stress, leading to feelings of exhaustion or overwhelming tiredness, which may occur even without the presence of other more classic symptoms such as chest pain or shortness of breath.

In the context of heart attacks, this symptom is particularly notable because individuals may not always recognize it as a warning sign. The fatigue can be accompanied by other symptoms like discomfort in the chest, nausea, or lightheadedness, reinforcing the importance of recognizing a broader range of signs rather than just the traditional ones.

The other options present symptoms that are not typically associated with a heart attack. Blurry vision can be related to various health conditions but is not a direct indicator of a heart attack. Irregular breathing, while a potential sign of distress, is more generalized and not specific to heart attacks. Sweet, fruity breath usually indicates the presence of ketones and is typically associated with diabetes-related conditions rather than cardiac events. This distinction emphasizes the need to be aware of the specific symptoms that may signal a heart attack.